Lubricating device



Dec. 16, 1924. 1,519,706

A. L.. Rosa LUB-RICATING DEVICE Filed March 28, 1922 2 sneezs-sneet 1 I|I muuwmf 77 7@ Il l I IE l 1 27 i. 22 S mi nl. 4 l 73 i )1y 2 1li f3 yi f3 6c? I m I ,l .Hl wlnmm 1 `r| 42 LLl-J) Pfg '1. Pfg 'l A T TUHNE ysDec, 16, 1924.

A. L. ROBEv LUBRICATING DEVICE Filed March 28, 1922 2 Sheets-Sheet 2ffllllllll? UWHHHHHHHH INVENTDH LEX LHUf/H.

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A T TUHNEYS Patented Dec, l, l924.

ALEX L. ROBE, GF FRESNO, CALIFORNZA CARTER AND ONE-FOURTH TO @Liar-ENCEH.

FORNIA.

El' KER, BOTH OF FRESNO, CALZI- Application filed March 28, 1922.

To all whom t may concor/n it known that l, ALEX L. Roer, a citi Zen ofthe Dominion of Cana-da, and a resident of Fresno, county of Fresno, andState of California, have invented a new and useful lubricating Device,of which the following is a specification.

The present invention relates to improvements in lubricating devices andhas particular reference to power driven devices of the characterdescribed such as are now frequently used in garages for effecting aquicl'; and eflicient lubrication of the various bearings in a motorvehicle. rlhe principal object of the present invention is to provide apower driven lubricating' device that is light in its structure, can beconveniently carried about and still furnishes an enormous pressure ifsuch is desired. Lubricating devices of similar character have been usedbefore, but mine provides certain features which render the same moreeiiicient and increase its availability for different purposes. ilspecial feature of my device is its ease of operation especially so faras it provides means for relieving the pressure as soon as the grcasingoperation is performed, which means automatically cause a reversal ofthe pumping action whereby the connecting' end of the grease carryingtube is cleared of grease and wasting' of the same prevented. rEheportability of the device allows of the use of a short hose or otherflexible connection between the device and the bearing which decreasesthe danger of the hose breaking down under the high pressure frequentlyrequired for effective lubrication. My device also provides for theapplication of a variable pressure in accordance with the needs of thebearing to be lubricated.

lhe preferred form of my invention is illustrated in the accompanyingdrawing, in which Figure 1 shows a side elevation of my device; Figure 2a side elevation talren at right angles to the first view; Figure 3 anenlarged cross sectional detail view through n y pump; Figure l asection through the device along lines AI-l of Figure 2; Figure 5 adetail sectional view of a cylinder used in my device taken at rightangles to that shown in Figure 1l, and Figure 6 a side elevation partlyshown in section of a modified Serial No. 547,588.

form of my device. lllhile I have shown only the preferred forms of myinvention, l wish to have it understood that various changes ormodifications may be made within the scope of the claims hereto attachedwithout departing from the spirit of the invention.

My device comprises in its essential features the pump (1), the powerplant (2) and manual control means (3) for pump and power plant.

The power plant as shown in the main form is driven by air pressure. Acylinder (il) has a piston (6) reciprocably secured therein which isadapted to drive the plunger (7) of considerably smaller cross section.Compressed air is alternately admitted on opposite sides of the piston(6) from a source of supply not shown in the drawing, through the pipe(8) controlled by the valve normally seated by the spring (11). rlCheair supply is regulated by the valve (12) comprising in its essentialfeatures a sleeve adapted to be reciprocated in the cylinder (il) bymeans of an auxiliary piston (13) reciprocating in an auxiliary chamber(14;) and connected with the valve through a shaft (16). The sleeve orvalve (12) is provided with three annular recesses (17), (18) and (19)disposed in the outer periphery of the sleeve in spaced relation to eachother, the central recess (18) being wider than the outer recesses (17)and (19). rEhe latter two recesses are connected with the interior ofthe sleeve by means of a plurality of perforations (21) and (22). Thisvalve operates as follows:

is shown in Figure 4i it occupies its uppermost position and its lowerrecess (19) registers with a port (23) connecting with the air intakepipe ln this position compressed air is admitted through the pipe (8),the port (23), the recess (19) and the perforations (22), into theinterior of the cylinder and forces the piston (6) downwardly, the airunderneath the piston being allowed to escape through the passage (9A)in the wall of the cylinder into the central recess which at that timeregisters with a port (26) lea-ding to the outside of the cylinder.`When the downward stroke of the piston is completed the valve is moveddownwardly so that now its recess (18) registers with the air inlet (28)while losing its connection with the exhaust port (26) but maintainingits connection with the passage (24) in the wall of the cylinder'.Simultaneously the recess (17) has descended to a point where itregisters with the eX- haust port (26). The air now enters through thepassage (23) into the recess (18) and through the passage (24) to theunderside of the piston, while the air above the piston issimultaneously allowed to escapel through the perforations (21).y therecess (17) and the exhaust port (26).

The same air actuating the piston controls the auxiliary piston (18)actuating the valve (12) in the following` manner: (see Figure 5). Asthe `piston approaches its lowermost position it uncovers a passage (27)in the cylinder wall which connects through the tube (28) with the upperend of the auxiliary piston chamber (14) thus forcing the auxiliarypiston and with it the valve. (12) downwardly. The air underneath thesaid auxiliary piston is at the saine time allowed to escape through atube (29) connecting with a passage (81) in the wall of the cylinder',which latter leads to the inside of the same at a place covered at thattime by a wide recess (32) in the outer part of the piston (6), so thatthe eX- haust air is allowed to enter this recess and to escape to theoutside of the cylinder through a port (38), which at all timesregisters with the wide recess As the piston approaches its uppermostposition it clears the interior opening of the passage (81) andcompressed air is forced through said passage and the tube (29)underneath the auxiliary piston (13), while the air above the same issimultaneously allowed to escape through the tube (28), the passage(27), the recess (82) in the piston and thel exhaust port. Asuitablevent allows any leakage air to escape from around the shaft (16)which otherwise might interfere with the successful operation of theauxiliary piston Another vent (87) in the lower portion of the cylinderallows leakage air to escape from around the plunger (7). c

The pump (1) receives its lubricant through the hose connection (4,1)and the tube (42). rllhe lubricant comes from any suitable source ofsupply and preferably kept 'under pressure suiiicient to feed the sameto the port at the end of the tube (42). The pump normally dischargesthrough the port (44) into a hose or other suitable ieXible connection(46), the free end of which is secured in any suitable manner, as by thebayonet joint (47) to the bearing to be lubricated. The plunger (7)draws the lubricant from the port through the suction passage (48) andthe check valve (49) into the casing (51) and eXpels the same on itspower stroke through the discharge passage (52) and the check valve (53)into the discharge port (44). lrlhis action is, however, adapted to bereversed owing to the fact that a reversing valve (54) is introducedinto the system. The lattervalve crosses the paths of the suction andthe discharge passages '(48) and (52) and comprises a valve steml(56)having two preferably ball shaped valve heads (57) and (58) securedthereon in spaced relation to each other. Each valve head is adapted toco-operate with two opposing valve seats so that when the valve stem isin the position shown inv Figure 3 one set of seats is engaged by thetwo valve heads, while when the valve stem is forced to the right theopposing set of valve seats is engaged. l/Vhen in the position shown inFigure 8 the valves do not interfere with the normal operation of thepump and the lubricant is allowed to enter through the port (48) into anannular recess (59), and through radial passages (61), past the valve(58) into the suction passage (48), and can be forced through thedischarge passage (52) past the valve (57) into the discharge (44). Butwhen the valve stem (56) is pushed to the right the opposing set ofvalve seats is engaged and the suction stroke of the plunger (7) willnow draw on the discharge port (44) from which the lubricant will bedrawn past the valve (58) into the suction passage (48), and past thevalve (49) into the plunger casing (51), while on the power stroke itwill be forced through the discharge passage (52) past the valve intothe cylindrical space (62), from which it passes through the radialpassages (68) into the annular recess (64), which connects, through thecommunication (66), with the inlet port so that the action of the pumpis then reversed.

It will be clear from the vabove that there are provided a feed passagethru which lubricant noramlly flows to the pump chamber, and a dischargepassage thru which the lubricant is forced from the pump chamber by thedescending plunger 7 5 and that these passages are connected by twoseparate by-passages. With the valves in the position shown in' Fig.8,-that is, closing both by-passages and leaving the feed and dischargepassages open, normal discl'large of the lubricant under pressureoccurs. lilith movement of the valve heads 57 and 58 to their oppositeextreme, that is, to close both feed and discharge passages and leavingthe lay-passages open, the How of lubricant thru the feed and dischargepassages is reversed and the lubricant is then pumped out of theconnections and returned to the supply.

As particular structural features l might mention that the valveconstruction can be easily taken apart dueto the fact that it issupported in two opposing plugs (67) and (68) and that the valve head(57 threadedly secured to the end ot the valve stem, as shown at (71),so that the body portion of the valve can he withdrawn n the plug (68)while its end can be withdrawn with the plug (67). To loci; the valvehead (57) to the valve stem l provide an opposing threaded member (72)which is provided with a. cylindrical head (73) adapted to slidablyengage the rylindrical chamber (62), thereby furnishing a guide tor thevalve stem.

The valve is actuated by the handle (l pivotally secured in the case(73) in the proximity or the valve, as at (7a). The casing is rigidlysecured to the pump (l), as at (76), extends sideways from the samethrough a short distance, then runs parallel to the power plantsurrounding the tube (42) and is rigidly secured to the casting (77)containing the passage rlhe handle or grip is normally forced outwardlyby a spring (78) and when in that V position it pulls the valveoutwardly by means or' the connecting linlr (79) engaging a lever (81),pivoted at (82), the free end of which is forked as shown at (83) andengages an annular groove at the end ot the valve stem. ln this positionthe pumping' action of the device is reversed. 1W hen the handle ispressed downwardly over the resistance of the spring (78) the valve ispushed inwardly and sets they pump for normal action.

The handle or grip 3 not only actuates the valve (511) but itsimultaneously controls the valve (9) admitting compressed air into thepower plant. This control is effected by means oi" the block (86) at thefar end of the handle which is provided with two cams (87) and (88)disposed in spaced relation to each other so as to leave a recessbetween them. In either of its eXtreme positions one ot the cams opensthe valve (9) so that compressed air is admitted, but while the handleis moved from one position to the other the recess between the two camsallows the valve (9) to close and to thus render the power plantinactive while the change is effected. t will be remembered that thischange of the handle from one extreme position to the other effects areversal. ot the. pumping action, so that as a result of the camarrangement the power plant is inactive while the reversal is eiiected.

The operation of my device should be readily understood from theforegoing description. 1t should be remembered that compressed air isadmitted to the power plant through the pipe (8) and that its supply iscontrolled by the two cams (87 and 88, that the lubricant is lmittedunder slight pressure through the hose connection (el) and the tube(el-2), that the pump u., tion may be reversed by in .is or' the valve(54), and that both thev latter valve and the valve are simultaneouslyvcontrolled i the handle so that the whole device subject to the controlor' the operator by means of a slight pressure with his hand..

To stop the action olf the power ant and or' the pump altogether. theoperator holds the handle in a middle position es shown in il, until hisdevice is disconnected.

ln Figure 6 is shown the same device operated by an electric motorinstead ct by air pressure. The motor (Q1) is provided with a worm onits shaft which worm engages a worm i (Sie) actuating a connecting rodsecured to the gear wheel by means ot the pin rEhe connecting rod drivesthe piston and causes the same to reciprocate in the cylinder (99). ylheplunger (101) i". by the piston (98) in the same manner as in the devicepreviously described, and tifs plunger performs the same function as theplunger ci the air driven pump. A stationary Contact (102) taires theplace oit the valve stem (9) and the cams (87) and (88) are replaced bytwo contacts (103) and (l0-i) secured to the handle (106) in spacedrelation to each other. lt will be seen that by this arrangement thesaine results are obtainec as in the previous example, that is, when thehandle is pressed downwardly firmly the contact (104) will engage thecontact (102) and will cause the pump to force al lubricant into thebearing to be lubricated. l/Vhen sucient lubricant is admitted, theoperator releases the handle and while doing so the action of the pumpis reversed in the manner previously described, while the power plant isrendered inactive until the second contact (103) engages the contact(102) when the motor will again drive the pump with reversed results.

l claim:

1. A power driven pump of the character described having meansassociated therewith for reversing its action, actuating means for thereversing mechanism, and means associated with said actuating means fordisconnecting the power while the reversal is eiiiected.

2. A power driven pump of the character described having meansassociated therewith for reversing its action, aspringpressed grip foroperating the reversing mechanism, and means associated with said gripfor disconnecting the power while the reversal is effected 3. In alubricating device, a single acting pump including a suction passage forthe feeding of the lubricantto the pump and a delivery passage for thedischarge of lubricant from the pump, means for reverslilil ing the flowof lubricant thru said passages, means for controlling the applicationof energy to the pump, and means for the unitary operation of saidreversing means and said energy controlling means.

4f. In a lubricating device, a pump including a suction passage4v forthe feeding of lubricant to the pump and a delivery passage for thedischarge of lubricant from vthe pump, means in said passages for re- 4versing the flow of lubricant thru said passages, means for controllingthe application of energy to the pump, and means vfor the unitary'operation of said reversing means and said energy controlling meansincluding means for automatically interrupting the application of energyto the pump during the said reversa-l of flow.

5. In a lubricating device, a fluid pressure operated pump including asuction passage for the feeding of lubricant to` the pump and aldelivery passage for the'discharge of lubricant fromv the pump, valvemea-ns arranged insaid passages for reversing the flovv of lubricant thirethru, a valve for controlling the application of pressure fluid tosaid pump, a pivotedgrip, means connecting the grip With said valvemeans so that in one extreme position of the grip said valve meanseffects the normal flow of lubricant thru said passages, a` spring forpressing the grip to the other extreme position so as to move said valveinea-ns to reverse the normal flow of lubricant and a cam on said gripfor effecting the opening in both extreme positions of theA grip saidpressure fluid controlling valve and the closingthereof in the middleposition of the grip.

6. A lubricating device comprising a cylinder, a pump plunger in saidcylinder, fluid pressure operated means for reciprocating said plunger,a passage for the feeding of lubricant to said cylinder, a passage forthe discharge of lubricant from said cylinder,

a` by-passage connecting said feed andv discharge passages, a secondby-passage con`V necting said feed and discharge passages, unitary valvemechanism for selectively closing both lay-passages and leaving saidfeed and discharge passages open or for closing said feed and dischargepassages and Y leaving said by-passages open whereby the fiovv oflubricantthru said passages may be` reversed. v

7. ln a lubricating device, a pump inh cluding a suction passage forthefeeding of e lubricant to the pump and a delivery pasleaving saidby-passages open whereby the flow of lubricantthru said passages may bereversed.

ALEX lL. noiseA

